Mozilla's major new ally will sell its Klif phone and six months' network service in 13 countries in Africa and the Middle East. Orange likes Firefox OS's inexpensive hardware requirements and expects to sell millions.

So you bought a new 4K TV and you're wondering what's on. The answer right now is: not much. But the list is growing. Here's a look at what you can watch now in 4K, and what's coming down the pike in the near future.

Officially unveiled at IFA in Berlin, the new AX900 series promises "the company's best picture performance" rivalling the TV tech for which Panasonic is best-known: plasma. Also announced was an 85-inch 4K TV and a step-down series of 4K sets.